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Renesas X5045S8IZ-2.7T1
- Part No.:
- X5045S8IZ-2.7T1
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
X5045S8IZ-2.7T1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,828
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Product details
Overview
X5045S8IZ-2.7T1 from Intersil (now Renesas) is a 4K-bit CPU supervisor IC integrating power-on reset, watchdog timer, supply voltage supervision, and SPI EEPROM in an 8-lead SOIC package. It features 2.93V reset threshold, -40°C to +85°C industrial temperature range, 3.3MHz SPI interface, and block-lock EEPROM protection. It is used in industrial process controllers to ensure reliable microcontroller startup and brownout recovery.
For engineers reviewing the X5045S8IZ-2.7T1 datasheet, X5045S8IZ-2.7T1 pinout, X5045S8IZ-2.7T1 application, or X5045S8IZ-2.7T1 equivalent, key selection criteria include VTRIP reprogrammability, watchdog timeout configurability, EEPROM endurance (1M cycles), active-low reset assertion down to VCC = 1V, and SOIC-8 RoHS-compliant packaging with tape-and-reel delivery.
Technical Context
The X5045S8IZ-2.7T1 implements a dual-function CS/WDI pin for chip select and watchdog input, with internal reset generation triggered by either VCC falling below 2.93V ±2.5% or watchdog timeout. Its status register contains nonvolatile WD0/WD1 bits selecting 200ms/600ms/1.4s timeouts or disabled mode, and BL0/BL1 bits enabling quarter/half/full EEPROM block lock protection.
It uses a proprietary Direct Write™ EEPROM cell architecture delivering 1,000,000 write cycles and 100-year data retention. The SPI interface operates at up to 3.3MHz with MSB-first protocol, supporting 16-byte page writes and requiring WREN instruction + CS high transition to initiate nonvolatile writes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTRIP Threshold | 2.93V ±2.5%; factory-programmed low-voltage reset trip point for brownout detection |
| Watchdog Timeout | Selectable 200ms / 600ms / 1.4s or disabled; configured via nonvolatile WD0/WD1 bits in status register |
| EEPROM Capacity | 4Kbits (512 × 8); organized as one contiguous array with block-lock protection granularity |
| SPI Clock Rate | Up to 3.3MHz; enables fast configuration and data access without timing margin constraints |
| Standby Current | <10µA with watchdog off; ensures ultra-low power consumption in battery-backed systems |
| Reset Assertion Level | Active-low open-drain RESET output; valid down to VCC = 1V for fail-safe operation during deep undervoltage |
| Operating Temp | -40°C to +85°C; qualified for industrial environments with full parameter guarantees |
Pinout & Package
Package: 8-lead SOIC (Small Outline Integrated Circuit), RoHS-compliant Pb-free plus anneal finish, tape-and-reel delivery (T1 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CS/WDI | Chip Select / Watchdog Input | Active-low enable for SPI communication; falling edge resets watchdog timer; dual-role pin reduces system pin count |
| 2 - WP | Write Protect Input | Hardware-level EEPROM write disable when pulled low; complements software block lock for robust data integrity |
| 3 - SO | Serial Output | Push-pull data output; shifts out memory contents on SCK falling edge; eliminates need for external pull-up |
| 4 - VSS | Ground Reference | Primary return path for all internal circuits; must be connected to system ground plane for noise immunity |
| 5 - VCC | Supply Voltage | 2.7V–5.5V operating range; powers all functions including reset generator, watchdog, and EEPROM core |
| 6 - SCK | Serial Clock Input | Master-generated clock synchronizing all SPI transfers; rising edge latches SI, falling edge clocks SO |
| 7 - SI | Serial Input | Command, address, and data input; latched on SCK rising edge; supports full instruction set including WREN/WRSR/READ/WRITE |
| 8 - RESET | Reset Output | Active-low open-drain output; asserts during power-up, brownout, or watchdog timeout; requires external pull-up resistor |
Key Features
| Feature | Design Value |
|---|---|
| Reprogrammable VTRIP | Factory-set 2.93V threshold can be adjusted upward using VP = 15–18V and WREN + write-to-address-01h sequence |
| Block Lock™ Protection | Nonvolatile BL0/BL1 bits enable selective write-protection of 0%, 25%, 50%, or 100% of EEPROM array |
| Direct Write™ EEPROM | 1,000,000 write cycles and 100-year data retention achieved via proprietary floating-gate cell architecture |
| Low-Voltage Reset Validity | RESET remains asserted down to VCC = 1V, ensuring deterministic behavior during deep brownout conditions |
| Integrated Power-on Reset | Automatic 200ms (typ) reset pulse on power-up prevents microcontroller execution before VCC and oscillator stabilize |
Applications
| Industrial Process Controllers | Routers and Network Switches |
|---|---|
Use Scenario: Microcontroller-based PLCs monitoring sensor inputs and controlling actuators in harsh factory environments. IC Role / Device Role / Timing Role: CPU supervisor providing power-on reset, brownout detection, and watchdog supervision; EEPROM stores calibration coefficients and fault logs. Use Value: Ensures deterministic boot sequence and continuous operation under voltage fluctuations common in industrial power distribution. | Use Scenario: Embedded networking equipment requiring persistent configuration storage and fail-safe reboot after firmware update failures. IC Role / Device Role / Timing Role: Dual-function supervisor: RESET asserts during power instability; EEPROM retains MAC addresses, VLAN tables, and boot parameters. Use Value: Eliminates need for discrete reset IC + separate EEPROM, reducing BOM count and PCB area while improving system reliability. |
| Intelligent Instrumentation | Battery-Powered Data Loggers |
Use Scenario: Portable test equipment storing user-defined measurement profiles, calibration offsets, and historical readings. IC Role / Device Role / Timing Role: Supervisor monitors supply during battery discharge; EEPROM retains critical settings across power cycles. Use Value: Block-lock protection prevents accidental overwrites of calibration data; <10µA standby current extends battery life. | Use Scenario: Remote environmental sensors powered by coin-cell batteries, logging temperature/humidity at scheduled intervals. IC Role / Device Role / Timing Role: Low-power supervisor maintains system integrity during intermittent operation; EEPROM stores timestamped sensor data. Use Value: 1M write endurance supports years of field deployment; VTRIP reprogrammability allows precise brownout tuning for aging battery profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CPU supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6816EUK+T | Single-function pushbutton debouncer with reset; no integrated EEPROM or watchdog timer | Limited to manual reset initiation; cannot replace X5045S8IZ-2.7T1's memory or autonomous supervision functions | Select only if system already includes separate EEPROM and watchdog; not a functional substitute |
| STM8AF6266TCY | 8-bit automotive MCU with embedded 4K EEPROM and programmable reset logic; requires firmware development | Higher integration but demands software validation, qualification, and toolchain investment | Choose when adding processing capability is justified; avoid for drop-in supervisor replacement |
Compared with MAX6816EUK+T and STM8AF6266TCY, the X5045S8IZ-2.7T1 delivers verified, zero-firmware supervision with guaranteed EEPROM endurance and factory-trimmed VTRIP-enabling immediate deployment in industrial control and networking hardware without design iteration.
Availability
X5045S8IZ-2.7T1 is available at Aetrix Electronics and suitable for industrial process controllers, network infrastructure equipment, intelligent instrumentation, and battery-powered data loggers requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for X5045S8IZ-2.7T1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Intersil Corporation, now part of Renesas Electronics, designs high-performance analog and mixed-signal ICs for industrial, communications, and computing markets.
The X5045 family was engineered as an integrated CPU supervisor solution targeting embedded systems needing guaranteed power sequencing, fault-tolerant reset, and nonvolatile configuration storage-all in a single SOIC-8 package.
FAQ
What is the factory-set VTRIP voltage for X5045S8IZ-2.7T1?
The X5045S8IZ-2.7T1 ships with a factory-programmed VTRIP of 2.93V ±2.5%, corresponding to the "-2.7A" suffix in the ordering code. This threshold is guaranteed over the full -40°C to +85°C operating range and remains stable across device lifetime unless reprogrammed using the VP = 15–18V procedure defined in the datasheet. The X5045S8IZ-2.7T1 does not ship with the 2.63V or 4.63V thresholds.
Does X5045S8IZ-2.7T1 support both active-high and active-low reset outputs?
No, the X5045S8IZ-2.7T1 provides only an active-low open-drain RESET output. It belongs to the X5045 series (not X5043), which is designated for active-low reset functionality. The datasheet explicitly distinguishes X5045PZ-2.7A (active-low) from X5043PZ-2.7A (active-high). The X5045S8IZ-2.7T1 pinout, timing diagrams, and functional description all confirm RESET as active-low only.
How many write cycles does the EEPROM in X5045S8IZ-2.7T1 support?
The EEPROM in X5045S8IZ-2.7T1 supports a minimum of 1,000,000 write cycles, as specified in the datasheet under "SPI Serial Memory" and confirmed in DC Electrical Specifications. This endurance rating applies to the entire 4Kbit (512 × 8) array and is enabled by Intersil's proprietary Direct Write™ cell technology. The X5045S8IZ-2.7T1 specification exceeds standard EEPROM endurance by 10× compared to typical 100K-cycle devices.
Can the watchdog timeout period of X5045S8IZ-2.7T1 be changed after power-up?
Yes, the watchdog timeout period of X5045S8IZ-2.7T1 can be reconfigured after power-up by modifying the nonvolatile WD0 and WD1 bits in the status register using the WRSR (Write Status Register) command. These bits retain their setting across power cycles, allowing permanent configuration to 200ms, 600ms, 1.4s, or disabled. The X5045S8IZ-2.7T1 does not require factory programming to change timeout behavior.
What package type and lead finish does X5045S8IZ-2.7T1 use?
The X5045S8IZ-2.7T1 uses an 8-lead SOIC (Small Outline Integrated Circuit) package with Pb-free plus anneal finish-compliant with RoHS Directive 2011/65/EU. The "T1" suffix indicates tape-and-reel packaging for automated assembly. The lead finish is 100% matte tin, qualified for both SnPb and Pb-free soldering processes per IPC/JEDEC J-STD-020 moisture sensitivity level requirements.
X5045S8IZ-2.7T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.62V
- Output:
- Open Drain or Open Collector
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
X5045S8IZ-2.7T1 FAQ
1.How can I place an order for X5045S8IZ-2.7T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for X5045S8IZ-2.7T1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for X5045S8IZ-2.7T1 reliable?
The price and inventory of X5045S8IZ-2.7T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X5045S8IZ-2.7T1 is usually 5 days.
3.What payment methods are accepted for X5045S8IZ-2.7T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X5045S8IZ-2.7T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X5045S8IZ-2.7T1?
X5045S8IZ-2.7T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X5045S8IZ-2.7T1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for X5045S8IZ-2.7T1?
For technical support, including X5045S8IZ-2.7T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X5045S8IZ-2.7T1 requirements.
6.How does Aetrix verify that X5045S8IZ-2.7T1 is sourced from the original manufacturer or authorized distributors?
All X5045S8IZ-2.7T1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that X5045S8IZ-2.7T1 meets industry standards.
7.What is the process for return or replacement of X5045S8IZ-2.7T1?
All X5045S8IZ-2.7T1 units undergo pre-shipment inspection (PSI). If there is an issue with X5045S8IZ-2.7T1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The X5045S8IZ-2.7T1 part is unused and in its original packaging.
Return procedure for X5045S8IZ-2.7T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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